How to say in Czech: They have not seen him here before.

English
have not seen here before.
Czech
Nikdy předtím ho tady neviděli.
They have never seen him before.
Do they understand him?
They have never met him before.
Do they live here?
They live here.
Nobody understands him here.
I am here with friends.
Can they see him?
They can see him.
They are not old enough for him.

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